Dumas, E. (1971). Math activities for child involvement. Allyn and Bacon.
Citazione stile Chigago Style (17a edizione)Dumas, Enoch. Math Activities for Child Involvement. Boston: Allyn and Bacon, 1971.
Citatione MLA (9a ed.)Dumas, Enoch. Math Activities for Child Involvement. Allyn and Bacon, 1971.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.